djvu | 831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6

General

Target

831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
Size

771KB
MD5

f0618ae3a8e0f57cb2608904990621da
SHA1

b90e891d3f0c61ea1b875cd141bd3ec427f9f4f2
SHA256

831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6
SHA512

4f9949c1ed09dc10ea743b0c7878bd88b3cc872176d28ecea6b44e9b5b94676eac4954d90cc138350bb1659a0de00e7145b6794d9eec196e7e6dc0b0145b7d11
SSDEEP

12288:x3IXMKvrkQyyY82SuQQT2G+4EavNzu9i0oX15RMyjoRjW/TTfGpGaGAiG:1QrkQyK22QT2gs0MycRjQ/fGpnZ

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://cajgtus.com/test2/get.php

Attributes

extension
.bgzq
offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
payload_url
http://sdfjhuz.com/dl/build2.exe

http://cajgtus.com/files/1/build3.exe
ransomnote
ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. Do not ask assistants from youtube and recovery data sites for help in recovering your data. They can use your free decryption quota and scam you. Our contact is emails in this text document only. You can get and look video overview decrypt tool: https://wetransfer.com/downloads/54cdfd152fe98eedb628a1f4ddb7076420240421150208/403a27 Price of private key and decrypt software is $999. Discount 50% available if you contact us first 72 hours, that's price for you is $499. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0864PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3256-2-0x0000000004B00000-0x0000000004C1B000-memory.dmp	family_djvu
behavioral1/memory/3552-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3552-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3552-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3552-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3552-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1084-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1084-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1084-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1084-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1084-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1084-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1084-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1084-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1084-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1084-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1084-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2288054676-1871194608-3559553667-1000\Control Panel\International\Geo\Nation	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe

Modifies file permissions 1 TTPs 1 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exe

pid process

4944 icacls.exe

pid	process
4944	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2288054676-1871194608-3559553667-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\f788e375-2e47-4329-8f77-599e882ebbfd\\831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe\" --AutoStart"	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe

Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

18 api.2ip.ua
20 api.2ip.ua
48 api.2ip.ua

flow	ioc
18	api.2ip.ua
20	api.2ip.ua
48	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe

description	pid	process	target process
PID 3256 set thread context of 3552	3256	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 4760 set thread context of 1084	4760	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe

pid	process
3552	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
3552	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
1084	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
1084	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe

C:\Users\Admin\AppData\Local\Temp\831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
"C:\Users\Admin\AppData\Local\Temp\831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3256
- C:\Users\Admin\AppData\Local\Temp\831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
  "C:\Users\Admin\AppData\Local\Temp\831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3552
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\f788e375-2e47-4329-8f77-599e882ebbfd" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4944
- - C:\Users\Admin\AppData\Local\Temp\831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
    "C:\Users\Admin\AppData\Local\Temp\831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4760
  - - C:\Users\Admin\AppData\Local\Temp\831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
      "C:\Users\Admin\AppData\Local\Temp\831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:1084

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

File and Directory Permissions Modification

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Filesize
1KB

MD5
cb9e9c73d3688b51ee1899e25cd1cc7e

SHA1
b2d472d87ac099a708b7536b5c30e5e6f0d28b7e

SHA256
382e6d80f80afb665a9c3065602a8fb4a6c3ff73c06a0a6937ffc178466d97a2

SHA512
74f1d7c3c68c0ae4ebc7b1c270c2138f578b78b591d8c6af4b7bb56fd4f23e5cebdf9748e7045521c72c000e5a4f35adce8e62951470e65c531f95b26b52a54e

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Filesize
724B

MD5
8202a1cd02e7d69597995cabbe881a12

SHA1
8858d9d934b7aa9330ee73de6c476acf19929ff6

SHA256
58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

SHA512
97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Filesize
410B

MD5
5a210ad36133840e2a9fd17bf6bf05e7

SHA1
ff4c5c11eb3d799911aafb986e81f01f4e76ae86

SHA256
46b39fe145b98dc562e48d0faf6233e668eb0f2f7fbd1edb05e371211ea62dd1

SHA512
332a2ca52c2223ea0e8b6007df4ec25843cbc93d3fd5c56e441b90f4afa40878a1c9a7332eef8db28fe607b98443cc6fbe1670ebda43ff788cff9dac866d6e13

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Filesize
392B

MD5
45b98307983004c2b0b127e7c3524519

SHA1
8e7a2d85294989b544cc85ebbc574f71857a9d51

SHA256
5c0d0787b290ce1ab195db9c195f37738a52a686661424b7fd5c411938814496

SHA512
5db47e01b509181bbe5142f3805233abac2cefc3a4352461731f817ef3d3258e20398984291ac5b97be405674e0ab08a794d285e57c8715ae420cdee29bd0f39

Download Submit
C:\Users\Admin\AppData\Local\f788e375-2e47-4329-8f77-599e882ebbfd\831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe

Filesize
771KB

MD5
f0618ae3a8e0f57cb2608904990621da

SHA1
b90e891d3f0c61ea1b875cd141bd3ec427f9f4f2

SHA256
831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6

SHA512
4f9949c1ed09dc10ea743b0c7878bd88b3cc872176d28ecea6b44e9b5b94676eac4954d90cc138350bb1659a0de00e7145b6794d9eec196e7e6dc0b0145b7d11

Download Submit
memory/1084-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1084-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1084-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1084-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1084-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1084-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1084-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1084-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1084-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1084-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1084-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3256-2-0x0000000004B00000-0x0000000004C1B000-memory.dmp

Filesize
1.1MB

Download
memory/3256-1-0x0000000002F50000-0x0000000002FE6000-memory.dmp

Filesize
600KB

Download
memory/3552-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3552-15-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3552-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3552-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3552-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4760-18-0x0000000002E00000-0x0000000002E98000-memory.dmp

Filesize
608KB

Download

description	pid	process	target process
PID 3256 wrote to memory of 3552	3256	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 3256 wrote to memory of 3552	3256	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 3256 wrote to memory of 3552	3256	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 3256 wrote to memory of 3552	3256	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 3256 wrote to memory of 3552	3256	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 3256 wrote to memory of 3552	3256	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 3256 wrote to memory of 3552	3256	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 3256 wrote to memory of 3552	3256	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 3256 wrote to memory of 3552	3256	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 3256 wrote to memory of 3552	3256	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 3552 wrote to memory of 4944	3552	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	icacls.exe
PID 3552 wrote to memory of 4944	3552	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	icacls.exe
PID 3552 wrote to memory of 4944	3552	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	icacls.exe
PID 3552 wrote to memory of 4760	3552	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 3552 wrote to memory of 4760	3552	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 3552 wrote to memory of 4760	3552	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 4760 wrote to memory of 1084	4760	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 4760 wrote to memory of 1084	4760	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 4760 wrote to memory of 1084	4760	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 4760 wrote to memory of 1084	4760	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 4760 wrote to memory of 1084	4760	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 4760 wrote to memory of 1084	4760	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 4760 wrote to memory of 1084	4760	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 4760 wrote to memory of 1084	4760	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 4760 wrote to memory of 1084	4760	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe
PID 4760 wrote to memory of 1084	4760	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe	831a6434ce5d3cf2f5edf19f21a02bb485b887742662802e090210eb253ef7e6.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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